POLYPROPYLENE-BASED POLYMER COMPOSITION (VERSIONS), METHOD FOR PRODUCTION THEREOF (VERSIONS), USE THEREOF AND ARTICLES CONTAINING SAME Russian patent published in 2024 - IPC C08L23/12 B29C64/00 B33Y70/00 B33Y10/00 

FIELD: polymer industry.

SUBSTANCE: present invention relates to a polymer composition for making cast or 3D articles, a method of producing said composition and use for making articles, as well as articles containing said composition. Composition contains 65–90 wt.% polymer components, 5–30 wt.% mineral filler and 5–7 wt.% combining additive. Polymer components include (A) crystalline isotactic propylene homopolymer; (B) a first copolymer of ethylene with an α-olefin containing from 4 to 10 carbon atoms, and having density of 0.855 to 0.890 g/cm³; (C) a second copolymer of ethylene with α-olefin containing 3 to 8 carbon atoms and having density of 0.910 to 0.927 g/cm³. Content of component (B) is greater than content of component (C) in the composition.

EFFECT: compositions provide an improved balance of technological (reduced shrinkage of the article, no warping) and operational (strength characteristics) properties.

25 cl, 8 dwg, 2 tbl, 19 ex